If i understand the following code correctly the fuel dump switch should turn on and off when assigned to a toggle switch on my HOTAS. Currently I have to turn the switch off then on again to to change the state of the switch in game.
{ down = fuel_commands.DumpSw, up = fuel_commands.DumpSw, cockpit_device_id = devices.FUEL_INTERFACE, value_down = 1.0, value_up = 0.0, name = _('Fuel Dump Switch - ON/OFF'), category = {_('Left Console'), _('Fuel Control Panel')}},